我想从网络上获取文本,我编写了代码,使用indexOf和subString,但是它不起作用。
int index = response_str.indexOf(“远程IP地址:”);
index + =“远程IP地址:”。length();
index + =“ div>
”。length();
int end = response_str.indexOf(“ div>
”,index);
字符串strIP = response_str.substring(index,end);
Log.d(“”,“ Hello” + strIP);
这是示例文本,我想得到49.156.53.152
<身体>
远程IP地址: div>
** 49.156.53.152 ** div>
UserAgent: div>
Mozilla / 5.0(Windows NT 6.1; WOW64)AppleWebKit / 537.11(KHTML,如Gecko)Chrome / 23.0.1271.64 Safari / 537.11 div>
<!-CCorp员工们,祝你好运! ->
body>
您可以将html页面转换为字符串。并使用正则表达式/字符串操作来获取所需的数据
尝试{
if(!url_text.getText()。toString()。trim()。equalsIgnoreCase(“”)){
textView.setText(“”);
HttpClient客户端=新的DefaultHttpClient();
HttpGet请求=新的HttpGet(url_text.getText()。toString());
//获取响应
ResponseHandler responseHandler = new BasicResponseHandler();
字符串response_str = client.execute(request,responseHandler);
textView.setText(response_str);
}其他{
Toast.makeText(getApplicationContext(),“ URL字符串为空。”,Toast.LENGTH_LONG).show();
}
}
catch(例外e){
System.out.println(“发生某些错误。”);
textView.setText(e.getMessage());
}
也许最简单的方法是使用sting.split函数
字符串[]分隔= response_str.split(“ **”);
分开的[0]; // **之前的部分
分开的[1]; //您需要的ip字符串
分开的[2]; //第二个之后的部分**
|
您必须使用Java的Javascript接口对象来从HTML网页中获取所有数据。
最终的WebView webview =(WebView)findViewById(R.id.browser);
webview.getSettings()。setJavaScriptEnabled(true);
webview.addJavascriptInterface(new MyJavaScriptInterface(this),“ HtmlViewer”);
webview.setWebViewClient(new WebViewClient(){
@Override
public void onPageFinished(WebView view,String url){
webview.loadUrl(“ javascript:window.HtmlViewer.showHTML” +
“('''+ document.getElementsByTagName('html')[0] .innerHTML +' head>');”);
}
});
webview.loadUrl(“ http://android-in-action.com/index.php?post/” +
“常见错误和错误以及如何解决以避免它们”);
}
类MyJavaScriptInterface {
私有上下文ctx;
MyJavaScriptInterface(Context ctx){
this.ctx = ctx;
}
公共无效的showHTML(String html){
新的AlertDialog.Builder(ctx).setTitle(“ HTML”)。setMessage(html)
.setPositiveButton(android.R.string.ok,null).setCancelable(false).create()。show();
}
}
|
您应该尝试使用它。
myString = String.subString(“ ”,YOUR_ORIGINAL_STRING.len);
需要的字符串= myString.endsWith(“ div>”);
|
您可以使用JSoup。
文档doc = Jsoup.connect(URL_TO_HTML_PAGE).get();
元素newsHeadlines = doc.getElementsByAttribute(“ value1”);
字符串ip = newsHeadlines [0] .text()。split(“ **”)[1];
最后一行基于Greezer帖子。我个人将其替换为与所有可能的IP地址匹配的简单正则表达式模式。
就像是:
\ b(25 [0-5] | 2 [0-4] [0-9] | [01]?[0-9] [0-9]?)\。(25 [0-5] | 2 [ 0-4] [0-9] | [01]?[0-9] [0-9]?)\。(25 [0-5] | 2 [0-4] [0-9] | [01 ]?[0-9] [0-9]?)\。(25 [0-5] | 2 [0-4] [0-9] | [01]?[0-9] [0-9] ?)\ b
|
你的答案
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